Simply put, as sugarmomma said, this is threadworm. You should probably contact your breeder (esp if you have a health guarantee), bc there is a link between uncleanliness in kennels and threadworm - not the only method of transmission, however. I would be concerned this dog arrived at your doorstep w this. I would talk to a vet who knows about and has exp w threadworm. He can give you info on treatment/prognosis. |